Device and method for detecting a period of an input signal

Details Device and method for detecting a period of an input signal Device and method for detecting a period of an input signal

2005-11-15

2005-11-15

Ghayour, Mohammed (Department: 2631)

Pulse or digital communications

Synchronizers

Reexamination Certificate

active

06965659

ABSTRACT:
A device and method for detecting a period of an input signal including a count value setting portion; an A/D converter; a zero cross point detecting portion to detect a symbol change of digital values received from the A/D converter; a arithmetic processing unit; a counter; and a period value calculating portion. The arithmetic processing unit divides two sampling sectors, having a zero cross point in their center, by a preset value which is set in the count value setting portion, predicts a zero cross point sector based on the digital values of two sampling points, and calculates a count value of the reference clock in accordance with the predicted zero cross point sector and the preset value which is set in the count value setting portion.

REFERENCES:
patent: 4517519 (1985-05-01), Mukaiyama
patent: 4918590 (1990-04-01), Ohtuka et al.
patent: 5477003 (1995-12-01), Muraki et al.
patent: 6111833 (2000-08-01), Nakagawa et al.

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